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Mast

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Mast

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Category： Drilling accessory equipment

Key words：Drilling accessory equipmentMast

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Main Features

The mast (derrick) type is generally classified as A type, K type, tower type and mast type etc.

A type mast, its leg section is rectangular or triangle shape, with better loading capacity and stability, connected with pins between sections, installed at low level and erected or lowered down integrally by drawworks and A-frame.

K type mast, namely front opening mast, its transverse section is a П shape truss structure, its both sides are composed of several pieces or segments, its back is rigid frame or pole system of truss, connected with pins or bolts between segments and members, may be installed at low level and erected or lowered down integrally by drawworks or hydraulic cylinder, has the advantages of convenient installation and teardown, excellent rigidity.

Conforming to API Spec 4F, marked with API

SPECIFICATIONAS:

Model		JJ60/31-K	JJ90/38-K	JJ135/31-K	JJ225/42-KS	JJ225/42-K
Max. static load kN		600	900	1350	2250	2250
Effective height m		31	38	31	42	42
Top span (front×side) m		1.2×1.2	1.4×1.8	1.6×1.8	1.8×2	1.9×2
Bottom span m		4.8	5.5	5.3	5	7
Height of racking board m		17	24.5,25.5,26.5	17,17.5	25.5,26.5	24.5,25.5,26.5
Capacity of racking board m		1000	1500	2000	4000	4000
Wind withstanding capacity	Full setback and no hook load m/s	36	36	36	36	36
	No setback, no hook load m/s	47.8	47.8	47.8	47.8	47.8
	Mast erecting m/s	≤8.3	≤8.3	≤8.3	≤8.3	≤8.3
Weight kg		16000	27170	22000	24780	30000
Note:A--A type K--K type KS--K type, telescope

Model		JJ225/43-K	JJ315/45-K	JJ315/45-K	JJ315/45-K	JJ170/41-A
Max. static load kN		2250	3150	3150	3150	1700
Effective height m		43	45	45	45	41
Top span (front×side) m		1.9×2	2.3×2.3	2.1×2.05	2.1×2.05	1.7×2
Bottom span m		8	8.3	9.11	8	7.5
Height of racking board m		24.5,25.5,26.5	24.5,25.5,26.5	24.5,25.5,26.5	24.5,25.5,26.5	24.5,25.5,26.5
Capacity of racking board m		4000	5000	5000	5000	3000
Wind withstanding capacity	Full setback and no hook load m/s	36	36	36	36	36
	No setback, no hook load m/s	47.8	47.8	47.8	47.8	47.8
	Mast erecting m/s	≤8.3	≤8.3	≤8.3	≤8.3	≤8.3
Weight kg		43180	68000	57360	60600	37900
Note:A--A type K--K type KS--K type, telescope

Model		JJ450/45-K	JJ450/45-K	JJ450/45-K	JJ450/45-K	HXJJ135/33-KS
Max. static load kN		4500	4500	4500	4500	1350
Effective height m		45	45.5	45	45	33
Top span (front×side) m		2.2×2.2	2.5×2.3	2.2×2.2	2.5×2.2	1.8×1.65
Bottom span m		9.11	8.3	9	10	4×4.7
Height of racking board m		24.5,25.5,26.5	24.5,25.5,26.5	24.5,25.5,26.5	24.5,25.5,26.5	16,16.5,17.5
Capacity of racking board m		7000	7000	7000	7000	2000
Wind withstanding capacity	Full setback and no hook load m/s	36	36	36	36	36
	No setback, no hook load m/s	47.8	47.8	47.8	47.8	47.8
	Mast erecting m/s	≤8.3	≤8.3	≤8.3	≤8.3	≤8.3
Weight kg		62400	91200	75350	104780	31500
Note:A--A type K--K type KS--K type, telescope